The origin of lanterns?

In the Ming Dynasty, there was a weak scholar named Bai Mingjian who read a lot of poems and books and was ready to enter the official career.

One year during the Lantern Festival, fireballs burst everywhere and firecrackers exploded. There are hundreds of lanterns here: some are Hong Fei foxes, butch, insects and fish; Have a plenty of brocade of the sun in the sky, as well as the dragon lady for an outing. Sitting in the "Yulong Hotel" opened by my cousin, Bai Jian, who was watching the lights while drinking, couldn't help but write poems by generate and blurted out: "Every time celebrating the Yuan Dynasty, everyone lights Chun Qing."

Emperor Yongle, who happened to visit incognito, also drank in this shop. After listening to this scholar's words, his language is frank and clear, beautiful and natural, and it seems to flow out of his mind. He felt that the scholar had a good attitude and was different from ordinary people, so he tried his talent with another riddle:

Bones are scattered all over the floor,

The skin is thin and light.

What a stubborn question,

The beauty is heartbroken.

Bai Jian bowed to the fortune teller and told the answer. Ming Chengzu saw Bai Jian's quick thinking and loved it very much. Parting, deliberately borrowed rouge pleats from Bai Jian. Bai Jian readily agreed.

After Emperor Yongle returned to the palace, the scholar of Junyi was named Bai Jian as the top treasure hunter and toured Henan.

Do you know what the riddle of the emperor's poem is about?

Answer: "Lantern".